It often gets completely ignored.
Who said, "To hair is human?" exact: Who said, "To hair is human?"
Quotes are too easy to be used accidentally by laymen.Thanks for pointing that out.
"heir" is a much closer match for "hair" in terms of Levenshtein distance[1] (which indicates a typing error) and soundex[2] (misheard). But clearly "to err is human" should be offered as a possibility too.
@nimble: what about when you intentionally search for a misspelling?
Usually you can click "search for {what I actually typed}" but it's still annoying. I liked it when +'s and double-quotes consistently did the same thing every time.
Maybe there is a setting that does this still? I've tried playing with a few settings but have had mixed results / consistency...